* {
  padding: 0;
  margin: 0;
  font-size: 0;
}

#app {
  padding: 20px 50px;
}

.menu-item {
  font-family: '微软雅黑','Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  font-size: 20px;
  font-weight: 200;
  color: brown;
  line-height: 30px;
}